#include <iostream>
using namespace std;
class Complex{
private:
int rear;
int imag;
public:
Complex(){
rear=0;
imag=0;
}
Complex(int r ,int i){
rear=r;
imag=i;
}
Complex complex_add(Complex &d){
Complex c;
c.rear=rear+d.rear;
c.imag=imag+d.imag;
return c;
}
void print(); //输出函数
};
void Complex::print(){
cout<<"("<<rear<<","<<imag<<")"<<endl;
}
int main(int argc, char** argv) {
Complex c1(3,4),c2(5,-10),c3;
c3=c1.complex_add(c2);
cout<<"输出c3: ";
c3.print();
return 0;
}
这个是通过运算符重载实现的，第一个是通过函数实现的，明显比较麻烦
#include <iostream>
using namespace std;
class Complex{
private:
int rear;
int imag;
public:
Complex(){
rear=0;
imag=0;
}
Complex(int r ,int i){
rear=r;
imag=i;
}
Complex operator+(Complex &d){
Complex c;
c.rear=rear+d.rear;
c.imag=imag+d.imag;
return c;
}
void print(); //输出函数
};
void Complex::print(){
cout<<"("<<rear<<","<<imag<<")"<<endl;
}
int main(int argc, char** argv) {
Complex c1(3,4),c2(5,-10),c3;
c3=c1+c2;
cout<<"c1=";
c1.print();
cout<<"c2=";
c2.print();
cout<<"c1+c2=";
c3.print();
return 0;
}
重载运算的符进行分数的运算
#include <iostream>
#include<math.h>
using namespace std;
class Rational{
private:
void normalize(); //负责对分数的简化处理
int numerator; //分子
int denominator; //分母
public:
Rational(int num,int denom){
numerator=num;
denominator=denom;
normalize(); // 化简
}
Rational operator+(Rational rhs);
Rational operator-(Rational rhs);
Rational operator*(Rational rhs);
Rational operator/(Rational rhs);
void print();
};
void Rational::normalize() // 分子分母进行化简
{
int t;
if(denominator<0) // 分子小于0要处理
{
numerator=-numerator;
denominator=-denominator;
}
int a=abs(numerator);
int b=abs(denominator);
while(b>0) //欧几里得（辗转求余法）
{
int t=a%b;
a=b;
b=t;
}
numerator /=a;
denominator /=a;
}
Rational Rational::operator+(Rational rhs){
int a=numerator;
int b=denominator;
int c=rhs.numerator;
int d=rhs.denominator;
int e=a*b+c*d;
int f=b*d;
return Rational(e,f);
}
Rational Rational::operator-(Rational rhs){
rhs.numerator=-rhs.numerator;
return operator+(rhs);
}
Rational Rational::operator*(Rational rhs){
int a=numerator;
int b=denominator;
int c=rhs.numerator;
int d=rhs.denominator;
return Rational(a*c,b*d);
}
Rational Rational::operator/(Rational rhs){
int a=numerator;
int b=denominator;
int c=rhs.numerator;
int d=rhs.denominator;
return Rational(a*d,b*c);
}
void Rational::print(){
if(numerator%denominator==0) //如果可以变成整数
cout<<denominator/numerator;
else
cout<<numerator<<"/"<<denominator;
}
int main(int argc, char** argv) {
Rational f1(2,16);
Rational f2(7,8);
Rational res1=f1+f2; //加法重载
f1.print();
cout<<" + ";
f2.print();
cout<<" = ";
res1.print();
cout<<endl;
Rational res2=f1-f2; //减法重载
f1.print();
cout<<" - ";
f2.print();
cout<<" = ";
res2.print();
cout<<endl;
Rational res3=f1*f2; //乘法重载
f1.print();
cout<<" * ";
f2.print();
cout<<" = ";
res3.print();
cout<<endl;
Rational res4=f1/f2; //除法重载
f1.print();
cout<<" / ";
f2.print();
cout<<" = ";
res4.print();
cout<<endl;
return 0;
}
c++自学笔记2
原文：http://blog.csdn.net/lotluck/article/details/42948685
